18. In the figure, which of the following is a major arc? А A. FAC B. DAC C.ACG D. BAG C G 19. If AD is a diameter of O R and the mzADS = 359, find m_SAD S A. 48° B. 499 C. 50° D. 55° А R 20. What is the measure of JCE in the figure on the right? AAVAA F A. 20° B. 60° C. 80 D. 100